Improvement in thrashing-machines



W.- J. La GRANGE. THRAsmNG-MACHWE',

'Patented May 187e.

fwhich the grain is fed to the machine.

Y endof thecylinder.

NITEE STATES PATENT (Drufe` WILLIAM' J. LA GRANGE, oE sirUvvEsANi1 FALLS, NEW YORK.

`IMPROVEMENT. IN .VTHRASHING-MACHINES.

Specification forming part of Letters Patent No. 176,793, dated May 2,1876; application filed March 22, 1815. l

`. ication My invention relates to certain improvements` in the combination and arrangement of the concave of a tlnashing-machine, as will b e hereinafter more fully set forth.

In order to enableiothers skilled in the artl to which my invention appertains to make and use the same, Iwill now proceed to de scribe its construction and operation, referring to the annexed drawing, which forms a part of this specification, and in Whichf Figure l is a plan view of my machine.

Fig. 2 is a'longitudinal vertical section of the same through the center.

A represents the frame of my machine, at one end ot' which is the feed-table B, over G is the thrashing-cylinder,"provided on its outer side with a series of longitudinal ribs, a a, fastened thereon, and extending from end to p Each rib a is grooved longitudinally, forming, as it were, two parallel bars on a sin gle base. Above the cylinder C is a concave, D, provided 011 lits under side with two plates, b, which are grooved or corrugated longitudinally, and .extending from the distance the concave shall rise. y

ot' the cylinder C and concave D is a board,

near the center to each side, as shown. This v concave rests in metal frames d attached to the main frame, and it is held down by means of springs f, allowing-the concave to yield to the pressure ofV the' grain passing between the cylinder and concave. Through the top of each frame d passes set screws e e to regulate In front E, for the 'grain and straw to fall upon in passing to the separator, the straw being directed by the concave director Gr vThe straw is then carried out by the elevator H, which passes over a perforated board, I, to allow the grain carried `up by the straw to fall down. 'Ihe grain from the cylinder andl elevator falls down intothe hopper J of the 'mill underneath. n ,Y

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is.-

The anged frames d, provided with .setscrews e, in combination with the concave D and springs j', substantially as and for the purpose set forth. Y

In testimony'tha-t I claim the foregoing as my invention I hereunto affix my signature this llthvday of March, 1875. WM. J. LA GRANGE.

Witnesses:

J. H. .LA GRANGE, RUSSEL D. WILBUR. 

